+30% attack speed
+8% movement speed
+30% critical strike chance
UNIQUE – ENERGIZED STRIKE: Moving and attacking generates Energize stacks, up to 100. When fully Energized, your next basic attack gains FIRECANNON and deals 50 - 200 (based on level) bonus on-hit magic damage.
UNIQUE – FIRECANNON: Your next basic attack gains 35% increased range, up to a maximum of +150 range.
FIRECANNON can be used on structures.
As your next basic attack is granted extra range, does it also increase your leap range for Rengar's passive? If not then why is it a rather popular choice of item for a lot of Rengar builds?